A long straight conducting wire of length L and mass m carries a current I. The conductor is near the surface of the earth, in a uniform magnetic field.

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Presentation transcript:

A long straight conducting wire of length L and mass m carries a current I. The conductor is near the surface of the earth, in a uniform magnetic field of magnitude B, as shown in the diagram. (This is a “physics” wire. It magically has a current in it without being connected to anything else.) For what value of I will the net force on the conducting wire be zero? I  B

The conductor is near the surface of the earth. For what value of I will the net force on the conducting wire be zero? The conductor is near the surface of the earth. For what value of I will the net force on the conducting wire be zero? FB I  B Fg for net force to be zero: